commit 1b1a6fb7ee90529dbf0697954ed01f76a65f7d65
from: Omar Polo <op@omarpolo.com>
date: Fri Aug 04 09:52:27 2023 UTC

titan: iomux: return -1 on EOF without receving anything

otherwise it enters an infinite loop where it tries to read, return
zero, and tries again...

commit - fcc5a371b135db8bbbb250bf1793ffffd06dc644
commit + 1b1a6fb7ee90529dbf0697954ed01f76a65f7d65
blob - 62ba57c8fc412f0f500f06f4fc2319449263f70e
blob + e43765a91ce03ba349b8c0667db5f68d83303623
--- titan.c
+++ titan.c
@@ -112,6 +112,8 @@ iomux(struct tls *ctx, int fd, const char *in, size_t 
 			case -1:
 				return -1;
 			case 0:
+				if (outwrote == 0)
+					return -1;
 				return outwrote;
 			default:
 				outwrote += ret;